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Audit of COSL Drilling AS – follow-up of anchoring systems

On 15 and 16 September 2015, the Petroleum Safety Authority Norway carried out an audit of COSL's follow-up of anchoring systems.

Since 2010, there have been a number of anchor line failures on the Norwegian Continental Shelf. During the period, COSL experienced a double line failure on COSL Pioneer.

The objective of the audit was to verify that COSL has a system to provide for learning from its own and others' incidents in order to reduce the likelihood of a new line failure.

One non-conformity was identified in connection with model tests following an upgrade.

In addition, improvement points were identified in connection with:

  • Investigations and follow-up of investigations
  • Training and drills
  • Procedures
  • Inspection of lower fairleads

COSL Drilling AS has been given a deadline of 23 October 2015 to report on how the non-conformity and improvement points will be dealt with.

Entails that a condition is assessed as not complying with a regulatory requirement.

Improvement point:
Entails that we have identified a deficiency or weakness, without there being sufficient grounds for determining a breach of regulatory requirements.




Øyvind Midttun, press contact
Email: oyvind.midttun@ptil.no | +47 51 87 34 77